Cut-off valve for rotary engines.



- PATENTED SEPT. 22,1903.

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No. 739,566. I V

UNITED STATES Patented September 22, 1963.

V PATENT OFFICE;

SIMON S. WHITAKER, OF VENE'IIA, PENNSYLVANIA.

CUT-OFF VALVE FOR ROTARY ENGINES.

SPECIFICATION forming part of Letters Patent No. 739,566, datedSeptember 22, 1903.

Application filed February To all whom, it rmty concern.-

Be it known that I, SIMQN S. WHITAKER, a citizen of the United States,residing at Venetia, in the county of Washington and State ofPennsylvania, have invented a new and use ful Improvement in Out-0dValves for R0- tary Engines, of which improvement the following is aspecification.

Thisinvention relates to certain new and useful improvements in rotaryengines, and

particularly to a cut ofi valve connected thereto; and theinventionconsists in the certain details of construction and combination ofparts, as will be fully described hereinafter. V

The present invention is an improvement on the rotary engine describedand claimed in Letters Patent issued to me, dated December 23, 1902, No.716,503.

In the accompanying drawings, Figure 1 is a transverse vertical sectionthrough my improved rotary engine and cut-off valve, the same beingconstructed and arranged in acresting in bearings 8 and 9, which aresup-- ported by standards 10 from the base 2. The

shaft 7 carries a pulley-wheel 11, from which" the power is derived.

The reference-numeral 12 represents square portion carried by the shaft7, and upon said square portion is mounted a rotary wheel 14, said wheelhaving recesses formed in its periphery, as indicated at 15, therecesses carrying notches 16 for the reception of a spring 17.

The reference-numeral 18 indicates longitudinal openings in theperiphery of the wheel 14, allowing access to the recess 15, and in saidopening is mounted the partitions 19. These partitions have their outerends beveled, the beveled edges extending toward the casing 1, while theother end of said partition rests against the spring 17.

3,1903. Serial No. 141,678. (No model.)

In the upper face of the casingl is formed a downwardly-extendingportion 21, said portion bearing upon the periphery of the rotary Wheel'14 and said portion carrying ports 22 and 23.

, :In the outer periphery of the casing l is formed a steam-inlet 24,communicating with "a rotatable cut-off valve hereinafter described,said inlet commnnicating with the ports22 and 23, the junction of saidports forming aperture 25, in which is secured a valve 26, said valveseating itself in a seat 27, formed in the portion 21, the valve 26resting upon the bearing 28, said valve carrying a central stem 29,which passes through packing 30, the stem 29 carrying an operating-lever31. The valve 26 is formed of two cylindrical portions having anintervening space therein and connected together by an integralpartition. The upper cylindrical portion ofthe valve is formed withapertures and is'attached to the stem 29.

In the base of the casing 1 is an exhaustport 39, said exhaust-portcarrying a pipe 40, which passes through an aperture 41, formed in thebase portion 3, carried by the base 2.

Attached to the top of the casing 1 and in communication with thesteam-port 24 is a rotatable cut-oil valve consisting of the easleadingto the steamport 24. Monntedupon the shaft 44 is a rotatable valvehaving three arms 46 and portions 46', the latter adapted to close theport 24 when opposite and cut 0d the supply of steam to the cylinderduring a part of the stroke of the rotary wheel 14. Connected to thevalve-shaft 44 is a small sprocket pinion 51, operated by a belt 52,passing over a'larger sprocket 53, mounted upon the drive-shaft 7 of theengine, thereby providing a means of giving the valve 46 a continuousrotary movement.

The operation of my improved engine and cut-off valve is as follows:Upon the steam entering the inlet 24' the direction of the en-.

the reversing-valve 26, and as the valve is shown in the drawings theengine will travel in the direction indicated by the arrows. Upon thesteam entering the valve-casing 42 it passes through the port 24, whenthe same is uncovered and passes downwardly into the cylindrical portionof the engine until out 01f by the rotary movement of the said valve,which may be at one-half, one-third, or any part of the stroke,preventing a continuous flow of the steam into the cylinder, therebygetting the benefit of the expansion of the steam, for a purpose wellknown in the art. The tension of the springs 17, mounted in the recesses15, has a tendency to eject the partitions outwardly against thecylindrical casing, and upon the steam striking the said partitions thewheel 14; is revolved until said partitions pass the exhaust 39,when thesteam will be exhausted. It being desirous to reverse the engine, thevalve 26 is turned by means of the handle 31, thus closing the port 23and opening the port 22. Should one of the portions 46 of the valve 46cover the opening leading to the port 24 at the time of first startingthe engine,the valve 50is opened, admitting the steam direct to the port24, and after the engine has been fairly started the said valve closed.

Slight modifications and changes may be made in the details ofconstruction without departing from the spirit of the invention.

Having thus described my invention, what I claim, and desire to secureby Letters Pat cut, is

A rotary engine comprising a casing having inlet and outlet portsformedtherein, a rotary wheel mounted therein, said wheel havingrecesses with notches formed therein, the periphery of the wheel havingopenings formed therein communicating with the recesses, partitionsmounted in said openings with springs engaging the inner ends of thepartitions, the ends of said springs engaging in said notches, adownwardly-extending portion formed integral with the casing andengaging the periphery of the wheel, oppositelydisposed ports formed insaid downwardlyextending portion, a rotatable cut-off valve incommunication with the said ports, and a by-pass pipe leading from thesteam-inlet pipe to the oppositely-disposed port-s, substantially as andfor the purpose described.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

SIMON S. WHITAKER. In presence of M. E. HARRISON, F. O. HENZI.

